Two out of two tests so far are combat, and the teacher actively encourages violence among the students. Is this a school to train soldiers? Killers? What is the deal with this place?

I also have so many questions on how the swords "its hard to die here" ability works. We saw injuries still happen, including broken bones, so what happens if you break someone's neck? What happens if a rock from an explosion punches a hole through someone's skull? What happens if you turn someone's head to past with a several ton fist of rock? Most of the spells we've seen would instantly kill someone if they connected, so do people just not die if they are killed?